Fix file upload form to handle ota_update service

src/services/__mocks__/uploadFile.js

@@ -1,6 +1,6 @@
 import delay from "../../utils/delay";
 
-let uploadFileResponse = { url: "CLOUDFRONT_URL" };
+let uploadFileResponse = { data: { link: "CLOUDFRONT_URL" } };
 let uploadFileDelay = false;
 let issuedCancelToken = null;